University of California, San Diego electrical engineers are building a forest of tiny nanowire trees in order to cleanly capture solar energy without using fossil fuels and harvest it for hydrogen fuel generation.

Production of energy from the difference between salt water and fresh water is most convenient near the oceans, but now, using an ammonium bicarbonate salt solution, Penn State researchers can combine bacterial degradation of waste water with energy extracted from the salt-water fresh-water gradient to produce power anywhere.

EasyJet the European low-cost airline is to trial a new electric green taxi-ing system that could deliver significant fuel and carbon emissions reduction by removing the using of engine when manoeuvring in and out of airport stands.